class A/*<-_empty_::A#*/ {
  def b/*<-_empty_::A#b().*/: B/*->_empty_::B#*/ = ???/*->scala::Predef.`???`().*/
}

class B/*<-_empty_::B#*/ {
  def a/*<-_empty_::B#a().*/: A/*->_empty_::A#*/ = ???/*->scala::Predef.`???`().*/
}
